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7 March 1989 Custom Fixed-Focal Length Versus Zoom Lenses
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Proceedings Volume 1005, Optics, Illumination, and Image Sensing for Machine Vision III; (1989)
Event: 1988 Cambridge Symposium on Advances in Intelligent Robotics Systems, 1988, Boston, MA, United States
Automated optical inspection (A0I) technology has become vital in the printed wiring board (PWB) industry. AOI systems inspect automatically by scanning to acquire an image, processing the image to detect flaws, and displaying flaws to the operator for rework or rejection. AOI reduces costs by reducing scrap and improving yield. AOI systems pay for themselves by catching defects as early in the manufacturing process as possible: Before flawed artwork is used to print, before good layers are laminated with bad, before misdrilled boards are populated. The AOI-PWB industry places severe demands on optics technology. Features as small as six mils must be imaged clearly and registered exactly, and flaws as small as one mil can be fatal. We shall discuss how optics can be optimized for AOI;in particular, we shall explain the distinct advantages of fixed-focal length lenses over zoom lenses, and of custom lenses over general-purpose lenses.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Richard Mills and David Stoltzman "Custom Fixed-Focal Length Versus Zoom Lenses", Proc. SPIE 1005, Optics, Illumination, and Image Sensing for Machine Vision III, (7 March 1989);


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